I copied this from another consumer, trying to find out if this is a hardware issue or a software update before my return period is over.....SAMSUNG PLEASE RESPOND TO THIS FOR ALL INQUIRING USERS!!!!!!!! THIS IS LIKE THE FOURTH COMMUNITY POST ON THIS AND STILL NO ANSWERS?!?!?!? PLEASE SEE MY OTHER POST AND CONVERSATION WITH @SamsungCaleb....SHOULD WE LOOK FOR ANSWER ON SOCIAL MEDIA ABOUT THIS TV OR CAN WE GET AN ANSWER FROM SAMSUNG???
I've seen a reoccurring problem with new ps5 owners and the Q90T. The Q90T is able to output 4k 120hz with no problems. For some reason the Q90T can't output HDR along with with 4k 120hz signal. I know the PS5 is maxed out at 4:2:2 for 4k 120hz, is there any way the Q90T can play 4:2:2 HDR with 4k 120hz?
All video signal uses bandwidth, and HDR uses up a lot. A TV's or monitor's top listed stats usually are for basic signal within listed subsampling range. Depending on the source, monitor, and cable bandwidth capability, you can often trade off one aspect for another, such as turning refresh down to 60hz but then being able to achieve 4k at 4:4:4, or turning down to 4:2:0 to achieve 4k at 140hz, or 2k to achieve 4:4:4 140hz, etc.
If you're already hitting the ceiling/maximum stats, you can't add HDR to those particular parameters because all available bandwidth is already taken up.
So you'd have to lower whichever one of those three main aspects would be least detrimental to your experience, in order to make elbow room for HDR. For text readability, you'd want 4.4.4 and 2k-4k, so lower the refresh rate. If only smooth motion matters, then jack up the hz and lower the resolution and/or chroma subsamples. And somewhere in there, see if there's room for HDR with acceptable sacrifice, if it looks worth it.
Sadly it's a numbers race, and most consumers don't know which ones are actually important vs imperceptible. They'll look for the biggest K and the biggest hz, but be unaware of whether or not many other video options can fit those numbers or not. And hardware companies don't feel like being forthcoming with the full picture (heh) or offer their customers the truly best experience... They just want to make more sales than the competition by upping certain numbers and telling buyers that those are the most important. Like the old bit-wars in early console days (which got far less reliable at the Jaguar's claim of 64 bits), Sega's "Blast Processing", etc.
But yeah. Currently most screens are being sold with claims of what's doable, but not doable WELL. To get those numbers all to their highest without compromises, as well as a bit of future-proofing... You'd have to specifically find what each model's limits are, and whether it can do ALL the things you want at the same time.
Those'll be expensive, and you'll have to find deep honest capability stats with or without this or that feature.
(Also, newer vs older HDMI cables are a factor, so if possible find out their bandwidth capabilities. It's not about gold this or that, just pure bandwidth and the company being reputable.)
So yeah, try turning some aspects down and see if HDR becomes available or not. And see if it still looks good enough to keep using.